Rotary knife for hydraulic or steam sewer-pipe presses



- Nov. 29, 1927. 1,651,205

T. A. HiBBINS ROTARY KNIFE FOR HYDRAULIC OR STEAM SEWER PIPE PRESSES Filed July 24, 1926 2 Sheets-Sheet l HIH Nov. 29, 1927. 1,651,205

T. A. HiBElNS ROTARYKNIFE FOR HYDRAULIC OR STEAM SEWER PIPE PRESSES Filed July 24, 1926 2 Sheets-Sheet 2 Patented Nov. 29, 1.927.

UNITED STATES v 1,651,205 PATENT OFFICE.

THOMAS A. HIBBINS, OF VI'ELLSVILLE, OHIO, ASSIGNOR TO THE STEVENSON COMPANY,

ROTARY KNIFE FOR HYDRAULIC Application filed July 24,

My invention relates to improvements in rotary knives for hydraulic or steam sewer pipe presses.

The object of my invention is to provide a rotary knife for a hydraulic or steam sewer pipe press arranged within the lower end of the die and adapted to be normally retracted 'so as ,to be in beyond a path with the inner face of the pipe, so as to allow a free passage.

I to of the pipe in its formation from the die,

and pertains particularly to a structure to be applied to my improved hydraulic sewer pipe press, and my improved die, as shown in the application Serial No. 124,741 filed July 24, 1926. Y I

" Another object of my invention is to provide a rotary knife of this character which is automatically moved outwardly by centrifugal force by the rapid rotation thereof, to cause it to sever the pipe close to its discharge from the die, and so constructed and arranged that the die head'can be forced up into the die to form a socket on the lower end of the pipe. 7

A further object of my invention is to provide a rotary knife of this character which can be readily assembled in the die of the form herein shown and fully set forth in my copending application heretofore referred to, and which can be readily removed for replacing any of the worn or broken parts.

A still further object of my invention is to provide a knife of this character which is very effective in its operation and willa-b solutely retract so that it will not interfere with the forming of the pipe an'd'the socket during the normal operation of the pipe press, and provide a knife having certain details of structure and combination of parts hereinafter more fully set forth.

In the accompanying drawings F igure'l is a vertical sectional view the lower end of the clay cylinder showing the die carried thereby, and my improved knife applied thereto in its outward or cutting position. I a

Figure 2 is an enlarged top plan view partly in section of my improved knife.

Referring now to the drawings, 1 repre-. sents the lower end of the clay cylinder through which the clay is forced byvmeans of v the plunger head, all of which is fully shown and described in the application heretofore menueaed, and which needs no further de wipssa the laser at the relay area:

' arranged in the web for the it OF WELLSVILLE, OHIO.

OR STEAM SEWER-PIPE PRESSES.

1926. erial No. 124,742.

ing' flange 2, to which is bolted the arch ring 3 supporting the arch 3 forming a liner therefor and which is provided with the three inwardly extending webs 4, provided with the hollow cylindrical central portion 5, extending downwardly. This central portion 5 is internally threaded and into whichis screwed the solid cylindrical member 6, provided at its lower end with the externally threaded reduced portion 7. Screwed upon this reduced portion 7 is the der 1 is provided with an outwardly extenddie member 8 which forms the central portion of the die, and is provided with the outwardly diverging wall 9. Bolted to the arch 3 is a flange 10, carried'by the upper end of the choke ring 11, which is provided with a liner 12, having the inwardly obliquely arranged wall 13 terminating in the vertical wall 14:. Extending from the vertical wall 141-, this ring is provided with an outwardly obliquely arranged wall 15, terminating in a plane with the lower end of the choke ring 11. The choke ring 11 at its lower end is provided with an annular flange 17 to which is bolted the annular flange'18, carried by the outer die member 19. The annular flange 17 is provided with an annular downwardly extending flange 20, provided with set screws 21, adapted to engage the flange 18'of the die, and adjust the diemember 19 laterally so as to bring the oblique wall 22 flush with the wall 15 of the liner 12.

' trio motor 24 driving a train of gearing 25,

which in turn drives the shaft'26. The train of gearing is provided with a magnetic clutch 27 by means of which the shaft 26 is connected and disconnected from the train of gearing for stopping and starting the knife.

' Theshaft 26 extends horizontally through the arch ring 3, and is provided with a bearing 28 arrangedv therein, and the arch 3' is provided with an opening 29 which extends in through one of the webs 4. The inner end of the shaft extends within the central hollow portion 5, forn'1ed at the iii-- ends of the webs. The hearing so 16f the position, and said knife adapted to be moved by, a knife pivoted on said arm, spring,

means carried bythe arm for normally holdmg the knife in an inward position, said knife adapted to be moved outwardly by centrifugal force.

9. A cutter of the character described comprising a rotary shaft, a cylinder carried thereby, an arm carried by the outer end of the cylinder, a knife pivoted on the outer end of the arm, spring means within the cylinder for normally holding the knife in an inward position, said knife adapted to be moved outwardly by centrifugal force.

10. A cutter of the character described comprising a rotary shaft,a cylinder carried by the shaft, an obliquely arranged arm carried by the cylinder, a knife pivoted on the outer end of the arm, a sheave carried by the knife, a cable passing over the sheave and into the cylinder and normally drawn inwardly by spring means to hold the knife in an inward position, said knit! adapted to be moved outwardly by centrifugal force, against the tension of the spring means.

11. A cutter of the character described comprising a rotary shaft, a cylinder carried by the shaft, an arm carried by the cylinder and arranged at an angle thereto, a knife pivotally'mounted on the outer end of the arm, a sheave carried by the knife, a cable fastened over thesheave and extending into the cylinder and connected to a piston therein, a spring within the cylinder normally holding the piston to one end for holding the knife in an inward position, said knife adapted to be moved outwardly by centrifugal force against the tension of the spring.

12. A cutter of the character described comprising a shaft, an arm carried thereby, a sheave pivotally mounted on the arm, a knife removably attached to the sheave, and a spring held cable passing over the sheave, and normally holding the knife in an in- -ward position, said knife adapted to be moved outwardly by centrifugal force.

13. A cutter of the character described comprising a shaft, a weighted member pivotally carried by the shaft, a knife secured to the'weighted member, spring means for normally holding the weighted member inwardly, and said member adapted to be moved outwardly by centrifugal force.

14. A'cutter of the character described comprising a rotary shaft, an arm carried by the shaft, a weighted sheave pivotally mounted on the outer end of thearm, a knife secured to the weighted sheave, a cable passing around the sheave, and a spring arranged to normally draw the cable and holding the sheave inwardly, said sheave adapted to be moved outwardly by centrifugal force. 15. A cutter of the character described comprising a rotary shaft, a head carried thereby, a cylinder carried by the head at one side of the shaft, an obliquely arranged arm carried by the outer end of the cylinder, a sheave pivotally mounted on the outer end of the arm, a knife removably attached to the sheave, a cable passing over the sheave and into the cylinder and secured to the piston therein, a spring surrounding the cable and normally holding the piston to one end of the cylinder. and holding the sheave in its normal inward position, said sheave adapted to be moved outwardly by centrifugal force.

' 16.-The combination with a, pipe press, I

a-die having an annular passage, a vertical shaft on the inside of said passage, means for rotating said shaft, and a pivoted knife carried by the shaft and normally held in wardlv by spring means and adapted to be moved outwardly by centrifugal force against the tension of the spring means.

17. The combination with a pipe press having a die to form a pipe by an annular passage, a shaft rotatably mounted in the center of said die, means for rotating said shaft, a pivotally weighted knifecarried by the lower end of the shaft within the die,

spring means for normally holding the knife 7 in its inward position, said knife adapted to be moved outwardly by centrifugal force below the annular passage of the die.

18. The combination with a pipe-press, of a die having an annular passage for forming the pipe, a vertical shaft on the inside of the annular passage, means for rapidlywebs, a vertical shaft mounted in the cen-' tral member of the die and rotated by the horizontal shaft, means for-"rotating the horizontally I horizontal shaft, and a knife pivotally mounted on the lower end of the shaft, and

normally inwardly spring held and adapted to be moved out across the annular passage 7 of the die by centrifugal force.

2-0, The combination with a pipe press,

of an arch secured to the lower end of the the horizontal shaft, an arm carried by the lower end of the vertical shaft, a Weighted knife carried by the outer end of the M111, spring means for normally holding the knife inwardly beyond the vertical annular passage betyveen the, die members, said knife adapted to be moved outwardly by centrifugalforce across the annular passage between the die members.

21 A cutter of the character described comprising a shaft, a knife pivoted on said discharge passage, a horizontal shaft, means for normally holding the knife in an inward position and adapted to be moved outwardly by centrifugal force.

2 2. A cutter 'of the character described comprising a rotary shaft, a head carried by said shaft, a knife pivoted in said head, means for normally holding the knife in an inward position and adaptedto be moved outwardly by centrifugal force.

A cutter of the character described comprising a rotary shaft, a knife pivoted in said shaft, spring means for normally holding the knife in an inward position and adapted to be moved outwardly by centrifugal force.

2 1 A cutter of the character described comprising a rotary shaft, a housing carried thereby, an arm carried by the outer end of the housing, a knife pivoted on the outer end of said arm, s pr ing means Within the housing for normally holding the knife 1n an inward position, said knife adaptedto be moved outwardly by centrifugal force.

testimony whereof, I have signed this specification,

THOMAS A- H BBINs. 

